Proceedings of the Korea Water Resources Association Conference (한국수자원학회:학술대회논문집)
- 2004.05b
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- Pages.429-433
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- 2004
Experimental Estimation of Shear Stresses at Pier-Front
교각전면부 하상재료의 입도분포에 따른 전단응력 산정에 관한 실험적 연구
- Published : 2004.05.01
Abstract
According to researchers, the influential factors of scouring are generally divided into three factors: the flow conditions, the type and position of structures, and the characteristics of bed materials. In addition, scouring is affected by the 3-dimensional turbulent boundaries, the unsteady flow, the movement of sediment in the scour-hole area, the approach flow velocity and depth, the width of bridge foundation/pier, and the particle size of bed materials. However, it is difficult to estimate the scour depth near bridge piers when all conditions are factored in at once. Therefore, for reasonably accurate estimates of scour depth, it is essential to consider sufficiently the flow force and resisting force for scour. That is, to determine the shear stress concerning the bed material distribution is needed. In this study, the experiments were performed under the condition of a steady state of flow. As a result, scouring occurred at velocity ratios of 0.476,